Invincibility:
Press Start to pause game play, hold L2 + R2 and press
Up(2), Down(2), Left(2), Right(2), Square, Triangle,
Square, Triangle, then hold Select until the pause
screen disappears.
Slow motion:
Begin game play as Max, then hold R2 and press Up(4).
Kurt in boxer shorts:
Hold L2 + R2 and press Square(2), Triangle, Square
at the main menu.
Mixed character:
Press Start to pause game play, then hold L2 + R2 and
press Up, Down, Right, Left, X, Triangle, Circle, Square,
Square + Start to play as a character that is part Kurt,
Max, and Doctor Hawkins.
Panning camera view:
Press Start to pause game play, then hold L2 + R2 and
press Circle, X, Circle, X.
Crazy camera view:
Press Start to pause game play, then hold L2 + R2 and
press X, Circle, X, Circle.
Fixed camera view:
Press Start to pause game play, then hold L2 + R2 and
press Circle, X, Circle, Triangle.
Fart sounds from Doctor Hawkins:
Begin game play as Doctor Hawkins, then press
L2 + R2 + Left + X.
Full pause screen:
Pause game play, then hold L1 + R1.
Sites: